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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.experimentalcar;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertTrue;
import android.car.occupantawareness.GazeDetection;
import android.car.occupantawareness.OccupantAwarenessDetection;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.junit.MockitoJUnitRunner;
@RunWith(MockitoJUnitRunner.class)
public class GazeAttentionProcessorTest {
private static final long FRAME_TIME_MILLIS = 1000;
private static final float INITIAL_VALUE = 1.0f;
private static final float GROWTH_RATE = 0.5f;
private static final float DECAY_RATE = 0.4f;
private GazeAttentionProcessor mAttentionProcessor;
@Before
public void setUp() {
mAttentionProcessor =
new GazeAttentionProcessor(
new GazeAttentionProcessor.Configuration(
INITIAL_VALUE, DECAY_RATE, GROWTH_RATE));
}
@Test
public void test_initialValue() {
// Initial attention value should match input configuration.
assertThat(mAttentionProcessor.getAttention()).isEqualTo(INITIAL_VALUE);
}
@Test
public void testUpdateAttention_neverExceedsOne() {
// Maximum awareness should never exceed '1'.
long timestamp = 1234;
final GazeDetection onRoadDetection =
buildGazeDetection(GazeDetection.VEHICLE_REGION_FORWARD_ROADWAY);
// First pass should return initial value.
assertThat(mAttentionProcessor.updateAttention(onRoadDetection, timestamp))
.isEqualTo(INITIAL_VALUE);
timestamp += FRAME_TIME_MILLIS;
for (int i = 0; i < 100; i++) {
// Running on-road again with maxed out attention should max out at '1'.
assertTrue(mAttentionProcessor.updateAttention(onRoadDetection, timestamp) <= 1.0f);
timestamp += FRAME_TIME_MILLIS;
}
}
@Test
public void testUpdateAttention_neverBelowZero() {
// Minimum awareness should never fall below '0'.
long timestamp = 1234;
final GazeDetection offRoadDetection =
buildGazeDetection(GazeDetection.VEHICLE_REGION_HEAD_UNIT_DISPLAY);
// First pass should return initial value.
assertThat(mAttentionProcessor.updateAttention(offRoadDetection, timestamp))
.isEqualTo(INITIAL_VALUE);
timestamp += FRAME_TIME_MILLIS;
for (int i = 0; i < 100; i++) {
// Running on-road again with maxed out attention should max out at '1'.
assertTrue(mAttentionProcessor.updateAttention(offRoadDetection, timestamp) >= 0);
timestamp += FRAME_TIME_MILLIS;
}
}
@Test
public void testUpdateAttention_offRoadAndOnRoad() {
final GazeDetection onRoadDetection =
buildGazeDetection(GazeDetection.VEHICLE_REGION_FORWARD_ROADWAY);
final GazeDetection offRoadDetection =
buildGazeDetection(GazeDetection.VEHICLE_REGION_HEAD_UNIT_DISPLAY);
long timestamp = 1234;
// First pass should return initial value.
assertThat(mAttentionProcessor.updateAttention(onRoadDetection, timestamp))
.isEqualTo(INITIAL_VALUE);
timestamp += FRAME_TIME_MILLIS;
// Looking off-road should decay the attention.
assertThat(mAttentionProcessor.updateAttention(offRoadDetection, timestamp))
.isEqualTo(1.0f - DECAY_RATE);
timestamp += FRAME_TIME_MILLIS;
// Looking back up at the roadway should increase the buffer.
assertThat(mAttentionProcessor.updateAttention(onRoadDetection, timestamp))
.isEqualTo(1.0f - DECAY_RATE + GROWTH_RATE);
timestamp += FRAME_TIME_MILLIS;
}
/** Builds a {link GazeDetection} with the specified target for testing. */
private GazeDetection buildGazeDetection(@GazeDetection.VehicleRegion int gazeTarget) {
return new GazeDetection(
OccupantAwarenessDetection.CONFIDENCE_LEVEL_HIGH,
null /*leftEyePosition*/,
null /*rightEyePosition*/,
null /*headAngleUnitVector*/,
null /*gazeAngleUnitVector*/,
gazeTarget,
FRAME_TIME_MILLIS);
}
}
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